Install the LG Xenon usb drivers (LG Xenon CD download) on your PC, When you connect your LG Xenon to your PC, three virtual serial ports (COMn) ports will be installed. Make note of the "LG Mobile USB WMC Data Modem" one. LG Phone Problem and solution
Create a new Dial-up connection.
Enter WAP login and password.
Enter phone number *99***1#
LG Xenon phone photos – LG Cell phone pictures

Then connect as you would a normal dial-up modem. Once you verify the connection is working, you can go to the Properties the next time and un-check Prompt for name and password and Prompt for phone number on the Options tab. This will skip the prompt (assuming you let Windows save the password). LG-Xenon info
Note that your mobile provider may have rules that restrict, prohibit or even bill you for tethered access. Some may even had disabled tethered access in the phone itself. So YMMV, but I can say it works for my carrier.
LG Cell Phone – Related Posts LG-Xenon info
I have seen the AT&T ads offering tethering plans for $20, but no one at the 800 number knows anything about the ad. I just called AT&T CS and was told that, yes, they do have a $20 plan for 10mg and can be used with a LG Xenon. None of the AT&T stores believe that this unit will work as a modem. Guess I’ll have to try it and find out.